Template Fluorspar

[peejay]

Seems that when modules Gift Certificates and Discount Coupons are uninstalled definitions MODULE_ORDER_TOTAL_GV_STATUS and MODULE_ORDER_TOTAL_COUPON_STATUS no longer exist. Have tried ZC 1.5.7 and problem still persists. These values are used in the mega menu and mobile menu to decide whether to display the links or not.

[swguy]

Seems that when modules Gift Certificates and Discount Coupons are uninstalled definitions MODULE_ORDER_TOTAL_GV_STATUS and MODULE_ORDER_TOTAL_COUPON_STATUS no longer exist.

This is correct. You should always check

if (defined('MODULE_ORDER_TOTAL_GV_STATUS')) { ...

if (defined('MODULE_ORDER_TOTAL_COUPON_STATUS')) { ...

before using these values.

In PHP 5.6, it was ok to skip checking them, but not with PHP 7+! You will see the core code in Zen Cart 1.5.7 always checks these values before using them.